CN209804714U

CN209804714U - Perovskite solar cell electrode extraction structure

Info

Publication number: CN209804714U
Application number: CN201822255269.0U
Authority: CN
Inventors: 秦艺颖; 刘建国; 黄林; 文贵华; 周勇; 罗文俊; 叶金花; 吴聪萍; 邹志刚
Original assignee: Kunshan Innovation Institute of Nanjing University
Current assignee: Kunshan Innovation Institute of Nanjing University
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2019-12-17
Anticipated expiration: 2028-12-29

Abstract

The utility model discloses a perovskite solar cell electrode extraction structure, include: a first indium layer and a second indium layer; the conductive glass, the first indium layer, the outer electrode and the second indium layer are sequentially stacked from bottom to top; the outer electrode is embedded between the two indium layers; because two indium layers are arranged on the electrodes, the outer electrode is embedded between the indium layers, the welding resistance is small, the defect of poor direct contact welding strength between the outer electrode and the conductive glass is overcome, and the tensile strength of the external electrode is improved, so that the electrode has obvious advantages.

Description

perovskite solar cell electrode extraction structure

Technical Field

The utility model belongs to the new forms of energy field relates to a perovskite solar cell electrode extraction structure.

Background

perovskite solar cells (perovskite solar cells) are solar cells which utilize organic metal halide semiconductors of perovskite as light absorption materials, and the structure of the perovskite solar cells comprises a conductive matrix, an electron transport layer (ETM), a perovskite photosensitive layer, a hole transport layer (HTM) and a counter electrode. At present, most of perovskite solar cells are of single-substrate structures, and electrodes must be led out of single cell pieces to realize interconnection among the cell pieces; the conductive substrate commonly used in perovskite solar cells is generally FTO conductive glass, and due to the particularity of the glass substrate material, two methods are commonly used for electrode extraction: one is a lead wire which is led out by bonding conductive adhesive (taking epoxy resin and silver powder as main components) on a conductive glass electrode; the other type is directly clamped at the electrode end of the battery by an elastic metal clamp with a lead, and the leading-out electrode is connected with an external circuit; both of the above-described electrode lead-out structures currently employed have drawbacks, structure one due to the thermal expansion coefficient of epoxy resin of about 6 x 10^-5/° c, coefficient of thermal expansion of conductive glass 75 × 10^-7The temperature/DEG C is higher in the difference of the thermal expansion coefficients of the two components, so that the two components are easy to peel off at low temperature, and glass can be broken when the temperature is serious; the electrode of the second structure is only in physical contact, the contact resistance is large, the connection reliability is poor, and meanwhile, the electrode width is limited by the width of the reserved electrode on the conductive glass, so that an electrode lead-out structure capable of solving the problem needs to be found.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need to overcome at least one of the above-mentioned deficiencies in the prior art. The utility model provides a perovskite solar cell electrode extraction structure.

The perovskite solar cell electrode lead-out structure comprises conductive glass, an indium layer and an outer electrode;

The indium layer comprises a first indium layer and a second indium layer; the conductive glass, the first indium layer, the outer electrode and the second indium layer are sequentially stacked from bottom to top; the external electrode is embedded between the two indium layers.

According to the background art, two common methods for electrode extraction are as follows: one is a lead wire which is led out by bonding conductive adhesive (taking epoxy resin and silver powder as main components) on a conductive glass electrode; the other type is directly clamped at the electrode end of the battery by an elastic metal clamp with a lead, and the leading-out electrode is connected with an external circuit; both of the above-described electrode lead-out structures currently employed have drawbacks, structure one due to the thermal expansion coefficient of epoxy resin of about 6 x 10^-5/° c, coefficient of thermal expansion of conductive glass 75 × 10^-7The temperature/DEG C is higher in the difference of the thermal expansion coefficients of the two components, so that the two components are easy to peel off at low temperature, and glass can be broken when the temperature is serious; the electrodes of the second structure are only in physical contact, the contact resistance is large, the connection reliability is poor, and meanwhile, the width of the electrodes is limited by the width of the reserved electrodes on the conductive glass; and the utility model discloses a perovskite solar cell electrode extraction structure owing to set up two-layer indium layer on the electrode, the outer electrode buries and covers between the indium layer, and welding resistance is little, has compensatied the outer electrode simultaneously and has conducted the poor defect of glass direct contact welding strength, has improved external electrode's tensile strength, consequently has obvious advantage.

In addition, according to the utility model discloses a perovskite solar cell electrode extraction structure still has following additional technical characterstic:

Furthermore, the indium purity of the indium layer is 99.99 percent, the welding temperature is 180-280 ℃, and the thickness is 0.01-1 mm.

Furthermore, the external electrode is a photovoltaic solder strip with the connection temperature of 180 ℃ and the welding thickness of 0.1-0.2mm at 280 ℃.

Further, the conductive glass is FTO glass with the light transmittance of 85% ~ 95%.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a cross-sectional view of an electrode according to the present invention;

Fig. 2 is a top view of a battery structure according to the present invention.

In the figure, 1 is a conductive glass, 2 is a first indium layer, 3 is an external electrode, 4 is a second indium layer, 5 is a perovskite solar cell, 6 is a perovskite solar cell positive electrode, and 7 is a perovskite solar cell negative electrode.

Detailed Description

reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "lateral", "vertical", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "coupled," "communicating," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly connected, integrally connected, or detachably connected; may be communication within two elements; can be directly connected or indirectly connected through an intermediate medium; the term "fit" can be a surface-to-surface fit, a point-to-surface or a line-to-surface fit, and also includes a hole-axis fit, and a person skilled in the art can understand the specific meaning of the above terms in the present invention in specific situations.

The utility model discloses an inventive concept is as follows, through set up two-layer indium layer on the electrode, the outer electrode buries between the indium layer, and welding resistance is little, has compensatied the outer electrode simultaneously and has contacted the poor defect of welding strength with conductive glass direct, has improved external electrode's tensile strength, consequently has obvious advantage.

The invention will now be described with reference to the accompanying drawings, in which figure 1 is a cross-sectional view of an electrode according to the invention; fig. 2 is a top view of a battery structure according to the present invention.

As shown, according to an embodiment of the present invention, the perovskite solar cell electrode lead-out structure includes a conductive glass, an indium layer, and an outer electrode;

The indium layers comprise a first indium layer 2 and a second indium layer 4; the conductive glass 1, the first indium layer 2, the outer electrode 3 and the second indium layer 4 are sequentially stacked from bottom to top; the external electrode is embedded between the two indium layers.

According to the background art, two common methods for electrode extraction are as follows: one is a lead wire which is led out by bonding conductive adhesive (taking epoxy resin and silver powder as main components) on a conductive glass electrode; the other type is directly clamped at the electrode end of the battery by an elastic metal clamp with a lead, and the leading-out electrode is connected with an external circuit; both of the above-described electrode lead-out structures currently employed have drawbacks, structure one due to the thermal expansion coefficient of epoxy resin of about 6 x 10^-5/° c, coefficient of thermal expansion of conductive glass 75 × 10^-7The temperature/DEG C is higher in the difference of the thermal expansion coefficients of the two components, so that the two components are easy to peel off at low temperature, and glass can be broken when the temperature is serious; the electrodes of the second structure are only in physical contact, the contact resistance is large, the connection reliability is poor, and meanwhile, the width of the electrodes is limited by the width of the reserved electrodes on the conductive glass; the perovskite solar cell electrode lead-out structure is provided with two indium layersThe outer electrode is embedded between the indium layers, so that the welding resistance is small, the defect of poor direct contact welding strength between the outer electrode and the conductive glass is overcome, and the tensile strength of the external electrode is improved, thereby having obvious advantages.

In addition, according to the utility model discloses a perovskite solar cell electrode extraction structure still has following additional technical features:

According to some embodiments of the invention, the indium layer is a layer structure having an indium purity of 99.99% and a thickness of 0.01-1 mm.

The indium layer has the indium purity of 99.99 percent, the welding temperature of 180 ℃ and 280 ℃ and the thickness of 0.01-1 mm.

according to some embodiments of the present invention, the outer electrode is a photovoltaic solder strip with a contact temperature of 180-.

according to some embodiments of the present invention, the conductive glass is FTO glass having a transmittance of 85% ~ 95%.

Any reference to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. This schematic representation in various places throughout this specification does not necessarily refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.

While the invention has been described in detail and with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. In particular, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the invention. Except variations and modifications in the component parts and/or arrangements, the scope of which is defined by the appended claims and equivalents thereof.

Claims

1. A perovskite solar cell electrode extraction structure, comprising: conductive glass, indium layer and external electrode;

2. The perovskite solar cell electrode lead-out structure as claimed in claim 1, wherein the indium layer is a layer structure having a soldering temperature of 180-280 ℃ and a thickness of 0.01-1 mm.

3. The perovskite solar cell electrode lead-out structure as claimed in claim 1, wherein the outer electrode is a photovoltaic solder strip with a soldering temperature of 180 ℃ and a soldering thickness of 0.1-0.2mm at 280 ℃.

4. The perovskite solar cell electrode lead-out structure as claimed in claim 1, wherein the conductive glass is FTO glass having a light transmittance of 85% ~ 95%.